Valve.



Patented" Dec. 30, I902. L. EHRHARDT.

VALVE (Ab umion filed Apr. 14, 1902.

(No Model.)

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UNITED STATES LUDWIG EHRHARDT, OF MALSTATT- ATENT Fries.

BURBAOI-I, GERMANY, ASSIGNOR OF VALVE.

SPECIFICATION forming part of Letters Patent No. 717,365, dated December 1902- Application filed April 14, 1902.

To aZZ whom it may concern.-

Be it known that I, LUDWIG EHRHARDT, civil engineer and manufacturer, a subject of the King of Prussia, German Emperor, residing at No. 50 St. J ohannerstrasse, Malstatt- Burbach, in the Kingdom of Prussia, German Empire, have invented certain new and useful Improvements in Valves, of which the following is a specification.-

This invention relates to a valve especially applicable for pumps in which the valve proper consists of an annular plate, the seat for which extends on'both sides of an annular row of apertures. In the known valves of this kind the annular valve-plate has been guided either by a central stem or bya number of ribs; but in my novel construction the annular valve-plate is guided by a tube, and its inner edge is also provided with a short perpendiculartube,forming an annular sleeve that takes around said first-mentioned tube or guide-tube and is adapted to glide along said guide-tube. The latter is elongated in downward direction or in the direction of the valveseat in such a manner that the proper guidance is maintained also when the valve proper is closed. By constructing the valve in this manner I obtain a most perfect guidance for the valve proper or annular valve-plate, irrespective of whether the valve is employed in horizontal or vertical position, and the wear and tear of the parts along which the guidance takes place is practically absolutely uniform, there being no parts-such, for instance, as ribswhich are liable to undergo a one-sided friction.

In order to make my invention more clear, I refer to the accompanying drawings, in which similar letters denote similar parts throughout both views, and in which Figure 1 is a cross-section through a valve constructed according to my invention, and Fig. 2 is a section through some parts of a slightly-modified form of construction;

The annular valve-plate or valve proper, ct, has at its inner edge a guide-sleeve 12, extending either only upward, as-in Fig. 1, or upward and downward, as in Fig. 2. The guidesleeve 1) takes around a cylindrical tubular body 0, the lower edge of which is in one plane with the seat proper of the valve, and the seatplate g, to which the body 0 is secured by means of a central stem d, a bolt h, and a nut z', is provided below the edge of the guide-body Serial No. 102,872. (No model.)

a with an annular groove 6, through which the water may pass from the annular row of apertures 70 of the seat-plate g to the channels Z in the guide-body c d, the parts a and d being of course connected with each other by radial ribs or the like.

The valve a is pressed down upon its seat, which extends on both sides of the mouths of the annular row of apertures 7c, by a spring m, whichis compressed'when the valve is forced off its seat under the action of the pumpfi The whole arrangement is such that the valve may open and close very quickly, as is necessary in the high-speed pumps of modern construction, in which the stroke of the valve is but short, whereas the number of strokes is great.

Having now described my invention, what I desire to secure by a patent of the United States is 1. In a pump-valve, the combination with an annular valve-plate, of a guide-sleeve extending perpendicularly to the plane of said plate, a seat-plate and valve-seat, a cylindrical guide-tube and fluid-conduit located centrally with respect to the valve-plate, and having its lower edge terminating in a plane with the valve-seat, an annular row of apertures through the seat plate, an annular groove provided in the seat-plate directly beneath the lower edge of the guide-tube, and inside of the row of apertures, and means for connecting said tube with the seat-plate, as set forth.

2. In a pump-valve, the combination with an annular valve-plate, of an annular guide sleeve extending perpendicularly to the plane of said plate upward as well as downward, a seat-plate, an annular groove in the said seatplate below said annular sleeve, means for connecting said sleeve with the seat-plate, an 9 annular row of apertures through said'seatplate outside said annular groove,ja valveseat extending on both sides of said row, and an annular guide-tube havingits lower part extending down to the plane of the valveseat and terminating centrally of said groove.

In witness whereof I have hereunto set my hand in presence of two witnesses.

LUDWIG EHRHARlDT.

Witnesses:

GEORG KNAPPE, J EAN GRUND. 

